Answer:
The product of the means and extremes in this example: 15:18 = 5:6 are both 90.
Step-by-step explanation:
a/b = c/d
here, the means are b and c
here, the extremes are a and d
means: 18 and 5
extremes: 15 and 6
cross multiply 15:18 and 5:6
(15x6 and 5x18) both products are 90.
